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Finding the Fourth Proportional to 257,776.79, 386,671.67 and 70,787.75

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Solution

The fourth proportional to 257,776.79, 386,671.67 and 70,787.75 is: 106,183.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,776.79 : 386,671.67 = 70,787.75 : x
  2. Step 2: Convert to fraction form
    257,776.79/386,671.67 = 70,787.75/x
  3. Step 3: Cross multiply
    257,776.79x = 386,671.67 × 70,787.75
  4. Step 4: Simplify right side
    257,776.79x = 27,371,617,154.10
  5. Step 5: Solve for x
    x = 27,371,617,154.10/257,776.79
  6. Step 6: Final answer
    x = 106,183.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.